All,
Here is a short video (1:30) and a longer one (13min) profiling a Ellsworth Wareham, 100-year vegan man who appears to be still going strong, both physically and mentally.
He was a heart surgeon who didn't retire until 95. He is (not surprisingly) one of those long-lived, clean-living Seventh Day Adventists from Loma Linda California. He attributes his longevity to his low-fat vegan diet (which he adopted ~50 years ago) and his ability to avoid stress. His total cholesterol is 117, which he says makes him very unlikely to develop heart disease.
He now sees it as his mission to educate people about preventative medicine. Here is his wikipedia page for more information. He is quite an inspiration and the kind of person I think CR practitioners should aspire too!
--Dean